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Cushion|Lab Grown|IGI

1.91ct J VS1 Cushion Lab Grown Diamond

ID • J/VS1 • IGI LG778667115

Shape and cutting style on the report: Cushion modified brilliant

Certificate IGI LG778667115

Diamond specifications and retailer prices

From £319 GBP
$428 USD
As of October 28, 2026
Save £480 GBP (60%) vs most expensive(unlock to see where)
5 retailers carry this diamond
Most expensive: £1,068 GBP at MOH London · As of October 1, 2026
View at MOH London

About this 1.91ct lab-grown cushion diamond

This 1.91ct lab-grown cushion sits in the one-and-a-half to two carat band, graded J colour (near-colourless) and VS1 clarity (very-slightly-included), with a top-tier cut grade and certified by IGI LG778667115 or 778667115. Listed at 5 retailers as of October 28, 2026, with a 150% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.91
Carat
J
Colour
VS1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryVery Good
FluorescenceNone
Crown angle37.5°
Pavilion angle37.9°
OriginLab Grown
Grading LabIGI
CertificateIGI LG778667115
Dimensions8.01 × 6.64 × 4.43 mm
L/W Ratio1.21
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
8.01 mm6.64 mm1.91 ctJ / VS1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateIGI LG778667115
Side View
Table 57.0%Crown 37.5°Girdle: MED-STKPavilion 37.9°Culet: NoneDepth 66.7%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Oct 28
Current: £1,068 GBP|Low: £319 GBP|High: £1,068 GBP|Avg: £618 GBP|+0.1%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
October 29, 2026
Retailer 4£319 GBP
Retailer 3£425 GBP
Retailer 2£445 GBP
Retailer 5£799 GBP
MOH London£1,068 GBP

10 data points across 5 retailers

5 retailers£319 GBP to £799 GBP

B+
Cheapest Retailer
-
£319 GBP
$428 USD
A
Retailer 2
-
£425 GBP
$569 USD
View
A
Retailer 3
-
£445 GBP
$596 USD
View
B+
Retailer 4
-
£799 GBP
$1,071 USD
View
Most Expensive
MOH London
LG778667115 · Oct 1
£1,068 GBP
View
Price last confirmed 31 days ago
4 more retailers have this diamond
Prices start from £319 GBPSave up to £480 GBP

Carat Hunter is not affiliated with, endorsed by, or sponsored by any retailer listed. Retailer information is from publicly available sources and may not be current. Verify details directly with the retailer before purchasing. Return terms as we hold them. Check the retailer's own returns page before you buy.

A
1.91ct Cushion
£319 GBP